My brother sent me this photo this morning of this bird in his garden in Trealaw (Tonypandy). Is it a Merlin or a young Kestrel??

My brother sent me this photo this morning of this bird in his garden in Trealaw (Tonypandy). Is it a Merlin or a young Kestrel??
looks very like a buzzard
Difficult to judge size but the patterning certainly suggests Buzzard, and John Aggleton says.
Certainly looks like a Buzzard and what appears to be a concrete post gives an indication of its size.